commit 7f22a4ebc97817fd0968f5ea8295c9a59a6292e0
author Michael Niedermayer <michael@niedermayer.cc> Sat Nov 17 08:24:30 2018
committer Michael Niedermayer <michael@niedermayer.cc> Sat Dec 01 00:58:27 2018
tree 12de79651a5f616b1a2642ad29fc8947e98b5e9b
parent 5982614af1f564ac05c1aa535cbd12cbbb2aa526

avcodec/truemotion2rt: Fix rounding in input size check

Fixes: Timeout
Fixes: 11332/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2RT_fuzzer-5678456612847616

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/truemotion2rt.c

diff --git a/libavcodec/truemotion2rt.c b/libavcodec/truemotion2rt.c
index 9df0b52..e3ab998 100644
--- a/libavcodec/truemotion2rt.c
+++ b/libavcodec/truemotion2rt.c
@@ -116,7 +116,7 @@
     if (ret < 0)
         return ret;
 
-    if (avctx->width / s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
+    if ((avctx->width + s->hscale - 1)/ s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
         return AVERROR_INVALIDDATA;
 
     ret = init_get_bits8(gb, avpkt->data + ret, avpkt->size - ret);